Potential of Total Recycling Valuable Materials from Light-Emitting Diodes Module by Pre-Treatment Using Heating and Resin Decomposition

초록

The recycling of LED lamps is important to reclaim the valuable materials and prevent the pollution problem. Herein, a process was investigated to recycle all the constituents from the LED modules. Firstly, the LED package and the printed circuit board of LED module were completely separated at 250 oC for 15 min. The further decomposition of resin was studied in suitable solvents: (i) epoxy resin coated on PCB in polyethylene glycol and sodium hydroxide, and (ii) silicon resin from LED package in N-methyl-2-pyrrolidone and N.N-Dimethylformamide. The remained encapsulant was subsequently processed to recovery gallium and other valuable metals. © © 2023 Society for Mining, Metallurgy & Exploration. All Rights Reserved.